	var slideIndex = 0;1
	showSlides();
	
	function showSlides() {
		
	  var i;
	  var slides = document.getElementsByClassName("mySlides");
	  for (i = 0; i < slides.length; i++) {
	    slides[i].style.display = "none";  
	  }
	  slideIndex++;
	  if (slideIndex > slides.length) {slideIndex = 1}    
	  slides[slideIndex-1].style.display = "block";  
	  setTimeout(showSlides, 2000); // 切换时间间隔为 2 秒
	}
	$("#wechat").hover(
		function(){
			$("#shift-in").fadeToggle(300).show(function(){
				$("#shift-in").css("display","block");
			});
		},
		function(){
			$("#shift-in").hide();
		}
	)